Receive the latest celebrity updates in your inbox

Sylvester Stallone, left, star of the film "Daylight," arrives at the film's world premiere with his girlfriend Jennifer Flavin, center, and his son Sage Stallone, who co-stars in the film, Thursday, Dec. 5, 1996, in Hollywood district of Los Angeles.

Sage Stallone, the son of famed "Rocky" star Sylvester Stallone, was found dead at his Hollywood Hills home Friday, Los Angeles police confirmed to NBC Los Angeles. He was 36.

"We don't know what the circumstances are around it," Sage Stallone's attorney George Braunstein told NBC Los Angeles. "He was in good health, great spirits. He was thinking of getting married, working on a lot of film projects."

Coroners officials told The Associated Press that there were no signs of foul play or trauma and that there was no suicide note.

Assistant Chief Coroner Ed Winter said prescription bottles were recovered in an investigation, but he could not say what kind or how many, and whether they had a role in his death, The AP reported.

In Memoriam

He said an autopsy will be performed in the next few days and investigators will look into Stallone's medical history, but the cause of death will likely take several weeks while toxicology tests are performed.

Braunstein said Stallone's housekeeper found him Friday afternoon and that he did not believe reports that he had overdosed were true.

"It's a tragedy," Braunstein said.

Sylvester Stallone, who appeared upbeat and charismatic Thursday night at Comic-Con event, where he was promoting his new film "The Expendables 2," said in a statement that he was "devastated and grief-stricken over the sudden loss of his son," and that his thoughts are with Sage's mother Sasha Czack.

"Sage was a very talented and wonderful young man, his loss will be felt forever," the statement added.

Sage Stallone was the oldest of Sylvester Stalone's children and had appeared in a number of films, including "Rocky V," "Daylight" and "Chaos." He also directed the 2006 short "Vic."